title: Heptachlor epoxide in marine mammals.
abstract: The presence of heptachlor epoxide in harbour seals (Phoca vitulina) and white-beaked dolphins (Lagenorhynchus albirostris) has been confirmed by chemical derivatization and mass spectrometric analyses. An unknown compound at a retention time close to half of heptachlor epoxide interfered in the determination by electron capture detector-gas chromatography. On a WCOT CP-Sil 7 column programmed from 85 to 175 degree C two poorly separated peaks could be detected. Heptachlor epoxide contents up to 1.7 mg/kg (on a fat basis) were obtained, which were about 200 times lower than the PCB levels. The same ratio was also observed in fish from the same area.
mesh_terms: D000818:Animals; D010872:Caniformia / Q000378:metabolism*; D002849:Chromatography, Gas; D003634:DDT / Q000032:analysis; D004026:Dieldrin / Q000032:analysis; D004289:Dolphins / Q000378:metabolism*; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D006533:Heptachlor / Q000031:analogs & derivatives*; D006534:Heptachlor Epoxide / Q000032:analysis*; D007306:Insecticides / Q000032:analysis; D008297:Male; D011078:Polychlorinated Biphenyls / Q000032:analysis; D046048:Seals, Earless / Q000378:metabolism*; D014018:Tissue Distribution; D014873:Water Pollutants / Q000032:analysis
chemical_list: D007306:Insecticides; D014873:Water Pollutants; D006534:Heptachlor Epoxide; D006533:Heptachlor; D003634:DDT; D011078:Polychlorinated Biphenyls; D004026:Dieldrin